Needle-threading device for sewing-machines.



No. 633,260. I I Patented Se pt. l9, "s99.v

s...1. CHOUTEAU & c. A. DUPUIS. NEEDLE THBEADING DEVICE EUR SEWING MACHINES.

, (Application filed Mar. 28, 1398'. (No Model.) 2 Sheets-Sheet I.

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I No. 633,260. v Patentd Sept. 19,1899.

s. J. GHOUTEAU & c. A. nuPuls.

NEEDLE THREADING DEVICE FOR SEWING MACHINES. (Application filed. 1m. 2a, 1898.)

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(No llodel.)

UNITED STATES v PATENT O FICE.

' SAMUEL JULES CHOUTE'AU AND CHARLES ARSEN'E DUPUIS, or MONTIER-EN I DER, FRANCE.

NEEDLE-THREADING DEVICE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 633,260, dated September 19, 1899.

Application filed March 2 8, 1 89 8.

To all whom it may concern:

Be it known that we, SAMUEL JULES CHOU TEAU and CHARLES ARSENE DUPUIS, citizens of France, residing at Montier-en Der, in the Republic of France, have invented certain new and useful Improvements in Needle- Threading Devices forSewing-Machin es; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

- Our present invention is an improvement in sewing-machine attachments, and has for its object to provide a simple inexpensive device for threading sewing-machine needles, so constructed as to result in a saving of labor and time to the operator.

The following description, when taken in connection with the accompanying drawings, will enable any person of ordinary intelligence to readily understand and operate our needle-threader.

, In the accompanying drawings,which illustrate one of the forms our invention may assume, Figure 1 is a front view of the needlethreader. Fig. 2 is a side view as seen in the direction of the arrow G, the thread-cutter being seen in its initial position or the position assumed just before the cutting operation. Fig. 3 is a similar view, but showing the cutting-blade in its last position or after it has performed its function. Fig. 4 is a section on line A B 'of Fig. 1, also seen in the direction of the arrow G. Fig. 5 is a side view of the needle-threader'as attached to a sewing-machine. Fig. 6 is a front view, and Fig. 7 an end View thereof.

As shown in the drawings, the device is mounted on a slotted U-shaped support S, having two shanks G and T, and provided with means, as hereinafter described, whereby the threader can be attached to the head of a sewing-machine in such a manner that it can be readily brought in close proximity with the eye of the needle. The shank T has a notch R for the passage of the thread re-' inforced by a small rectangular cutter-plate H, rigidly secured to the shank by screws, rivets, or otherwise, and carryin g a pivot-pin J, upon which a shear or. cutter blade K is Serial N0. 875,472. (No model.)

adapted to oscillate. The axial or rear part of said oscillating cutter-blade is formed as a cam, which presses at each oscillation upon a flat spring U, extending upwardly from the shank G, to which it is secured. Between the two shanks G and T is located a stationary spindle L, on which is guided a slide 0, provided on its outer face with a flat spring N. Said shanks are both provided with suitable openings, through which is guided horizontally a stem E, located slightly above the U-shaped portion of the slide 0, and provided with a pin or screw M, by which it is secured to said slide. The pin M is so arranged that it can be moved backward onehalf the distance of its stroke without coming into contact with the shank of the slidestanding opposite to it, but presses against same during the remaining half of its stroke, 7o thus advancing the thread, which is held in the slide by the spring-blade N. During the first half stroke of the stem E the thread will be cut to present a fresh unraveled end before the needle-eye, and during the second half the thread is advanced and inserted in the needle.

The means for actuating the cutter-blade consists of an arm V, pivoted to the shank T at P in position to be oscillated by the stem E, which is beveled at its extremity for this purpose. 'Said arm carries a lug or projection which normally bears against the cutterblade K and when the stem E is reciprocated aetuates said cutter, the return movement being efiected by the spring U.

The device is attached to a sewing-machine and operated in the following manner: As shown in Figs. 5, 6, and 7, a represents the frame of the sewing-machine, b the presserfoot, and c a slotted support havinga two-part clamping member consisting of two semicylindrical pieces 6 d, having a suitable hinge connection at e. The two parts together form a collar, which can be readily secured 5 to the arm of the presser-foot by a screw f. This arrangement of collar permits of attaching the threader to any machine regardless of the diameter of the presser-foot. g is a slide-block mounted on the support S by (00 means of a screw it, movable in the slot 2', a set-screw j serving to regulate the height of I the needle-threader in a convenient position in front of the needle 7). The slide g is provided with a screw it, passed through and movable in the slotE of the support 0 to regulate the distance laterally from the needle. The thread is first inserted between the slide 0 and the spring clip or nipper N, connected thereto, and is pushed forward until it protrudes through the notch R. The needle is then placed in the position shown in Fig. 1, in which the eye thereof is directly opposite the notch R, and the stem E is thereupon pushed forward by means of the milled head D. Immediately on the beginning of its stroke the beveled end of the stem E presses against the arm, which in its turn presses on the back of the pivoted cutter-blade K, causin g the latter to move quickly toward the stationary blade H, thereby cutting cleanly the thread exposed between the two blades and presentinga fresh unraveled portion. This operation has occupied only the first half stroke of the stem E. During the final half the pin M carries the slide 0 forward and the needle is threaded. A sufficient length of thread is pulled through the needle, and the threader is pushed aside upon the presserfoot, so as not to interfere with the sewing.

Having thus described our invention, we claim 1. A device for threading sewing-machine needles, embodying a support, cutter-blades secured thereto, one movably and the other stationary, a thread-carrier and means substantially as described for first operating the cutters to shear the thread and then advance the same to the eye of the needle.

2. In a needle-threader such as described, the combination of a support, a stationary and a movable spring-pressed cutter-blade,

a pivoted arm contiguous the movable cutterthe thread is first sheared and then advanced 45 to the needle, substantially as described and for the purpose set forth.

3. In a needle'threader such-as described, the combination of a U-shaped support, a stationary cutter-blade mounted on one of its shanks, a movable cutter-blade pivoted to said shank, with a spring normally tending to keep said blades apart, a pivoted arm eontiguous the movable blade, an actuating means for the cutter-blade and thread-carrying means whereby the thread is first sheared and then advanced to the needle, substantially as specified.

4. In a needle-threader such as described, the combination of a U-shaped support, a stationary cutter-blade mounted on one of its shanks, a.movable cutter-blade pivoted on said shank, with a spring normally tending to keep said blades apart, a pivoted arm contiguous the movable blade, a stem E loosely mounted in the shanks of the support, a spindle rigidly mounted in said support, a slideblock having a spring-clip, adapted to be reciprocated by the stem E, said stem having its outer extremity tapered or beveled for actuating the pivoted arm, substantially as described and for the purpose set forth.

In testimony whereof we afiix our signatures in presence of two witnesses.

\Vitnesses:

HENRI MAILLARD, ARTHUR NEELERY. 

